Didi Stone is a minor character in The Secret Life of the American Teenager, introduced in Season 2. She is the mother of Jack Pappas, the widow of Mr. Pappas and the wife of Sam Stone. She is portrayed by Kristin Bauer Van Straten.
When she lost her first husband, Mr. Pappas, she was so sad that she started grief counseling. She met and fell in love with Reverend Sam Stone and then they got engaged and then they eventually married.
She also appears in the Season 4 final episode And Circumstance. She then makes a third appearance in the Season 5 finale after learning about Jack being attacked by a pimp and being in critical condition. She is then seen sobbing after her husband, Sam tells everybody that they should pray.
Also, in season 5 she confronts Grace at the Bowman family guest house. She tells her not to break up with Jack because of the recent trauma he suffered. This scares Grace and she tells Grace to not tell Jack the conversation happened because she will deny it and Jack will think Grace is just crazy for making something like that up. She tells Grace that she never liked her and that she has always been a bad girlfriend to Jack.